⌥ AI Coding agent for the terminal — hash-anchored edits, optimized tool harness, LSP, Python, browser, subagents, and more

A coding agent with the IDE wired in. omp.sh

Fork of Pi by @mariozechner

The most capable agent surface that ships. Continuously tuned by real-world use — complete out of the box, open all the way down.

40+ providers · 32 built-in tools · 13 lsp ops · 27 dap ops · ~27k lines of Rust core.

macOS · Linux

curl -fsSL https://omp.sh/install | sh

Bun (recommended)

bun install -g @oh-my-pi/pi-coding-agent

Windows (PowerShell)

irm https://omp.sh/install.ps1 | iex

Pinned versions (mise)

mise use -g github:can1357/oh-my-pi

macOS · Linux · Windows · bun ≥ 1.3.14

Edits that land on the first attempt. Reads that summarize files instead of dumping their content. Searches that return instantly. Pick any model — omp will get it right.

• read : summarized snippets · ideal defaults · selector hit rate
• search : fastest in the west
• lsp : everything your IDE knows, the agent knows
• prompts : adjusted relentlessly for each model

Read the full post ↗

Originally built on Mario Zechner's wonderful Pi, omp adds everything you're missing.

Most harnesses give the agent a Python sandbox and call it done. Ours runs persistent Python and a Bun worker, and either kernel can call back into the agent's own tools — read, search, task — over a loopback bridge. The agent loads a CSV with tool.read from inside Python, charts it from JavaScript, and never leaves the cell.

Ask for a rename and you get a rename. The call goes through workspace/willRenameFiles, so re-exports, barrel files, and aliased imports update before the file moves. Everything your IDE knows, the agent knows.

A C binary segfaults: the agent attaches lldb, steps to the bad pointer, reads the frame. A Go service hangs: it attaches dlv and walks the goroutines. A Python process is wedged: debugpy, pause, inspect, evaluate. Most agents are still sprinkling print statements.

Watch the capture ↗

Your rules sit dormant until the model goes off-script. A regex match aborts the stream mid-token, injects the rule as a system reminder, and retries from the same point. You get course-correction without paying context tax on every turn. Injections survive compaction, so the fix sticks.

Watch the capture ↗

Split a job across workers and get typed results back. task fans out into isolated worktrees, each worker runs its own tool surface, and the final yield is a schema-validated object the parent reads directly. No prose to parse, no merge conflicts between siblings, no orphaned edits.

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web_search chains fourteen ranked providers and hands whatever URLs it finds straight to read. Arxiv PDFs, GitHub pages, Stack Overflow threads come back as structured markdown with anchors intact — the same tool surface you use on local files. Cite, follow, quote, never lose where you came from.

Watch the capture ↗

Other agents shell out to rg, grep, find, and bash. On many machines those binaries don't exist, and on the ones where they do, every call costs a fork-exec round-trip. omp links the real implementations into the process. ripgrep, glob, find: in-process. brush is the bash, with sessions that survive across calls. The same omp binary runs on macOS, Linux, and Windows — no WSL bridge.

Get a clear verdict on whether the change ships, with every issue ranked P0 through P3 and scored for confidence. /review spawns dedicated reviewer subagents that sweep branches, single commits, or uncommitted work in parallel. You tackle what blocks release first; nothing important hides in a wall of prose.

Perfect edits, fewer tokens. The model points at anchors instead of retyping the lines it wants to change, so whitespace battles and string-not-found loops just stop happening. Edit a stale file and the anchors diverge — we reject the patch before it corrupts anything. Grok 4 Fast spends 61% fewer output tokens on the same work.

Other harnesses bolt on gh_issue_view, gh_pr_view, gh_search — each with its own parameters the agent has to learn and you have to debug. We skipped that. read already handles paths; PRs are paths. One interface to teach the model, one surface to keep correct.

The agent remembers your codebase between sessions. It writes facts mid-run with retain, pulls them back with recall, and compresses each session into a mental model that loads on the first turn of the next one. Project-scoped by default, so what it learns about this repo stays with this repo.

Run omp inside Zed and you get the same agent you drive from the terminal — reading the buffer you're actually looking at, writing through the editor's save path, spawning shells in the editor's terminal. Destructive tools pause for a permission prompt you can answer once and forget. No bridge, no plugin, no second brain to keep in sync.

Every other agent ships an importer and expects you to convert. omp reads the eight formats already on disk in their native shape — Cursor MDC, Cline .clinerules, Codex AGENTS.md, Copilot applyTo, and the rest. No migration script, no YAML-to-TOML port, no "supported subset" footnotes. The config your team wrote last quarter still works tonight.

omp reads the working tree through git-overview, git-file-diff, and git-hunk, then splits unrelated changes into atomic commits ordered by their dependencies. Cycles are rejected before anything is written. Source files score above tests, docs, and configs, so the headline commit is the one that matters. Lock files are excluded from analysis entirely.

Ten internal schemes — pr://, issue://, agent://, skill://, rule://, and the rest — resolve transparently inside every FS-shaped tool the agent already calls. read pr://1428 returns the same shape as read src/foo.ts. search walks a diff like a directory. agent://<id>/findings.0.path pulls a field out of a subagent's output by path.

Each merge conflict becomes one URL. The agent writes @theirs, @ours, or @base to conflict://N and the file resolves cleanly. Bulk form: conflict://*.

Watch the capture ↗

ast_edit returns a (proposed) card with the replacement count. The change is staged. The agent calls resolve with a reason; the TUI turns it into an Accept card and the disk move happens — atomic, all or nothing.

Watch the capture ↗

Stealth's on by default, so pages see a normal user instead of a headless bot. The same API drives any Electron app in place — point it at Slack and the agent reads your DMs the way it reads the web.

32 tools live in the same namespace as read and bash. Pin the active set with --tools read,edit,bash,… and the rest stay hidden but indexed — search_tool_bm25 pulls them back in mid-session when tools.discoveryMode says so.

Files & search

• read — files, dirs, archives, SQLite, PDFs, notebooks, URLs, and internal :// schemes through one path.
• write — create or overwrite a file, archive entry, or SQLite row.
• edit — hashline patches with content-hash anchors and stale-anchor recovery.
• ast_edit — structural rewrites previewed before apply, via ast-grep.
• ast_grep — structural code queries over 50+ tree-sitter grammars.
• search — regex over files, globs, and internal URLs.
• find — glob-based path lookup; reach for search when you need content matches.

Runtime

• bash — workspace shell, with optional PTY or background-job dispatch.
• eval — persistent Python and JavaScript cells with shared prelude and tool re-entry.
• recipe — invoke a target from a detected task runner — bun, just, make, cargo.
• ssh — one remote command against a configured host.

Code intelligence

• lsp — diagnostics, navigation, symbols, renames, code actions, raw requests.
• debug — drive a DAP session — breakpoints, stepping, threads, stack, variables.

Coordination

• task — fan out subagents in parallel, optionally workspace-isolated.
• irc — short prose between live agents in this process.
• todo_write — ordered mutations over the session todo list with phase tracking.
• job — wait on or cancel background jobs.
• ask — structured follow-up questions for interactive runs.

Outside the box

• browser — Puppeteer tabs over headless Chromium or CDP-attached apps.
• web_search — one query across configured providers, returning answer plus citations.
• github — GitHub CLI ops — repo, PR, issues, code search, Actions run-watch.
• generate_image — generate or edit raster images via Gemini image models.
• inspect_image — vision-model analysis of a local image file.
• render_mermaid — Mermaid source to terminal-friendly ASCII or PNG.

Memory & state

• checkpoint — mark conversation state for a later collapse-and-report.
• rewind — prune exploratory context, keep a concise report.
• retain — queue durable facts into the active Hindsight bank.
• recall — search the Hindsight bank for raw memories.
• reflect — ask Hindsight to synthesize an answer over the bank.

Misc

• calc — deterministic arithmetic — no model in the loop.
• resolve — apply or discard a queued preview action.
• search_tool_bm25 — BM25 over the hidden tool index; activates top matches mid-session.

Setting-gated, off by default: github, calc, inspect_image, render_mermaid, checkpoint, rewind, search_tool_bm25, retain, recall, reflect. Flip them on once, scoped per project.

Full reference →

Roles route work by intent. default for normal turns. smol for cheap subagent fan-out. slow for deep reasoning. plan for plan mode. commit for changelogs. Override at launch with --smol, --slow, or --plan; cycle through the configured models for the active role with Ctrl+P. Swap the active model mid-session with the /model slash command.

Auth tags below: oauth signs in with your provider account, plan routes through a coding-plan subscription, local runs against a local server with the key optional.

Direct APIs and gateways. Mix providers per role.

Anthropic oauth · OpenAI · OpenAI Codex oauth · Google Gemini · Google Antigravity oauth · xAI · Mistral · Groq · Cerebras · Fireworks · Together · Hugging Face · NVIDIA · OpenRouter · Synthetic · Vercel AI Gateway · Cloudflare AI Gateway · Perplexity oauth

Subscription-routed. /login attaches the session.

Cursor oauth · GitHub Copilot oauth · GitLab Duo · Kimi Code plan · Moonshot · MiniMax Coding Plan plan · MiniMax Coding Plan CN plan · Alibaba Coding Plan plan · Qwen Portal · Z.AI / GLM Coding Plan plan · Xiaomi MiMo · Qianfan · NanoGPT · Venice · Kilo · ZenMux · OpenCode Go · OpenCode Zen

OpenAI-compatible /v1/models. Local instances skip the key.

Ollama local · Ollama Cloud · LM Studio local · llama.cpp local · vLLM local · LiteLLM

• Custom providers — Declare anything that speaks openai-completions, openai-responses, openai-codex-responses, azure-openai-responses, anthropic-messages, google-generative-ai, or google-vertex in ~/.omp/agent/models.yml.
• Fallback chains — Per-role chains under retry.fallbackChains. When the primary throws 429s or hits a quota wall, the next entry takes the rest of the turn — restored on cooldown.
• Path-scoped roles — Nest paths: under modelRoles to pin a heavier default on one repo without touching the global config. Closest path wins.
• Round-robin credentials — Stack API keys per provider and the runtime rotates with session affinity and per-credential backoff. Useful when one key would burn its quota by lunch.

Full provider & routing reference at omp.sh/docs/providers.

web_search is built in, not bolted on. auto walks a fourteen-provider chain; pin one by name if you already pay for it. Behind every hit, site-aware extraction turns GitHub, registries, arXiv, Stack Overflow, and docs into structured markdown — anchors and link targets survive.

Fourteen backends. Pin one, or let auto walk the chain in order.

The agent gets structured content, not stripped HTML.

• Code hosts — github, gitlab
• Package registries — npm, PyPI, crates.io, Hex, Hackage, NuGet, Maven, RubyGems, Packagist, pub.dev, Go packages
• Research sources — arxiv, semantic scholar
• Forums — stack overflow, reddit, hn
• Docs — mdn, readthedocs, docs.rs

Pages convert to markdown with link structure intact. The agent can cite, follow, and quote without losing anchors.

Vuln lookups answer with vendor data, not blog summaries.

• NVD — national vulnerability database
• OSV — open source vuln feed
• CISA KEV — known exploited vulns

web_search reference ↗

Three crates, one platform-tagged N-API addon. Search, shell, AST, highlight, PTY, image decode, BPE counting — all in-process on the libuv pool. No fork/exec on the hot path.

• Crates: pi-natives, pi-shell, pi-ast
• Platforms: linux-x64, linux-arm64, darwin-x64, darwin-arm64, win32-x64

The table below is a per-module breakdown that intentionally omits glue and tests.

Same engine, four wrappers. omp runs the TUI. omp -p answers a single prompt and exits. The Node SDK embeds the session in your process. omp --mode rpc and omp acp hand the wheel to another program over stdio.

The TUI is the default surface. Tool calls render as cards, edits preview before they land, and ambiguity routes through the ask tool — a structured option picker the agent can call mid-turn. The keyboard handles the rest.

The same prompt cards surface over ACP, so editors get the picker without writing one.

@oh-my-pi/pi-coding-agent

Node and TypeScript hosts pull the engine in directly. The package exposes ModelRegistry, SessionManager, createAgentSession, and discoverAuthStorage; the session emits typed events you subscribe to.

import { ModelRegistry, SessionManager, createAgentSession, discoverAuthStorage } from "@oh-my-pi/pi-coding-agent";

const auth = await discoverAuthStorage();
const models = new ModelRegistry(auth);
await models.refresh();

const { session } = await createAgentSession({
	sessionManager: SessionManager.inMemory(),
	authStorage: auth,
	modelRegistry: models,
});
await session.prompt("list .ts files");

omp --mode rpc

For non-Node embedders, or when you want process isolation. NDJSON commands in, response and event frames out. --mode rpc-ui adds tool cards, selectors, and dialogs as extension_ui_request frames the host must answer.

$ omp --mode rpc --no-session
> {"id":"r1","type":"prompt","message":"list .ts files"}
< {"id":"r1","type":"response", ...}
> {"id":"r2","type":"set_model","provider":"anthropic","modelId":"sonnet-4.5"}
> {"id":"r3","type":"abort"}

omp acp

The Agent Client Protocol over JSON-RPC. When the editor advertises capabilities, tool I/O routes through it and writes are gated by session/request_permission.

Full reference: omp.sh/docs/sdk.

Pick it up at omp.sh.

omp is a fork of Pi by Mario Zechner, rewritten as a coding-first surface: sessions, subagents, slash commands, extensions — all TypeScript, all MIT, all on GitHub. Shape it from config, hook it from outside, or read the source when you need to.

An extension is a TypeScript module. Same tool API, same slash-command registry, same hotkey table, same TUI primitives the built-ins use. Nothing is reserved.

On first run omp inherits whatever is already on disk: rules, skills, and MCP servers from .claude, .cursor, .windsurf, .gemini, .codex, .cline, .github/copilot, and .vscode. No migration script.

Ask omp to write the piece you're missing, then /reload-plugins. Keep it local, ship it in a marketplace, or publish it to npm.

omp is a fork of pi-mono by Mario Zechner, extended with a batteries-included coding workflow.

Key ideas:

• Keep interactive terminal-first UX for real coding work
• Include practical built-ins (tools, sessions, branching, subagents, extensibility)
• Make advanced behavior configurable rather than hidden

/debug opens tools for debugging, reporting, and profiling.

For architecture and contribution guidelines, see packages/coding-agent/DEVELOPMENT.md.

MIT. See LICENSE.

© 2025 Mario Zechner
© 2025-2026 Can Bölük

made for terminals that stay open

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